4 Inch Air Filters

24x24x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!   24 x 24 x 4 MERV 8 HVAC Air Filters.   Actual Dimensions: 23 3/8” x 23 3/8” x 3 3/4”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks and captures lint,...

24x24x4 MERV 13 HVAC Air Filters

As Low as $22.39 per Filter!   24 x 24 x 4 HVAC Air Filter.  Actual Size: 23-3/8 x 23-3/8 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses, smoke, smog,...

20x25x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!     20 x 25 x 4 MERV 8 HVAC Air Filters.   Actual Dimensions: 19 ½” x 24 ½” x 3 ¾”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks...

20x25x4 MERV 13 HVAC Air Filters

As Low as $22.39 per Filter!   20 x 25 x 4 HVAC Air Filter.  Actual Size: 19-1/2 x 24-1/2 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses, smoke, smog,...

20x25x4 MERV 11 HVAC Air Filters

As Low as $16.79 per Filter!   20 x 25 x 4 MERV 11 HVAC Air Filters.  Actual Dimensions: 19-1/2 x 24-1/2 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria,...

20x24x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!   20 x 24 x 4 MERV 8 HVAC Air Filters.   Actual Dimensions: 23 3/8” x 23 3/8” x 3 3/4”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks and captures lint,...

20x24x4 MERV 13 HVAC Air Filters

As Low as $22.39 per Filter! 20 x 24 x 4 HVAC Air Filter.  Actual Size: 19-3/8 x 23-3/8 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses, smoke, smog, lead dust,...

20x24x4 MERV 11 HVAC Air Filters

As Low as $16.79 per Filter!  20 x 24 x 4 MERV 11 HVAC Air Filters. Actual Dimensions: 19-3/8 x 19-3/8 x 3-3/4 .   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria, Dust Mites,...

20x20x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!   20 x 20 x 4 MERV 8 HVAC Air Filters.   Actual Dimensions: 19 ½” x 19 ½” x 3 ¾”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks and...

20x20x4 MERV 13 HVAC Air Filters

As Low as $22.39 per Filter!      20 x 20 x 4 HVAC Air Filter.  Actual Size: 19-1/2 x 19-1/2 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses,...

20x20x4 MERV 11 HVAC Air Filters

As Low as $16.79 per Filter!   20 x 20 x 4 MERV 11 HVAC Air Filters.  Actual Dimensions: 19-1/2 x 19-1/2 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria,...

18x24x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!   18 x 24 x 4 MERV 8 HVAC Air Filters Actual Dimensions: 17 3/8” x 23 3/8" x 3 3/4”Filtration Rating: MERV 8, MPR 600, FPR 5Blocks and captures lint, dust, pet dander, pollen, dust mites, & mold Our...